122520553 has 4 divisors (see below), whose sum is σ = 122570640. Its totient is φ = 122470468.

The previous prime is 122520509. The next prime is 122520599. The reversal of 122520553 is 355025221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122520553 is a prime.

It is a super-2 number, since 2×122520553² = 30022571814851618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122520253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21175 + ... + 26332.

It is an arithmetic number, because the mean of its divisors is an integer number (30642660).

Almost surely, 2^122520553 is an apocalyptic number.

It is an amenable number.

122520553 is a deficient number, since it is larger than the sum of its proper divisors (50087).

122520553 is an equidigital number, since it uses as much as digits as its factorization.

122520553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50086.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 122520553 is about 11068.9002615436. The cubic root of 122520553 is about 496.6719682231.

Adding to 122520553 its reverse (355025221), we get a palindrome (477545774).

The spelling of 122520553 in words is "one hundred twenty-two million, five hundred twenty thousand, five hundred fifty-three".